In this condition, the pupil is not centered in the iris. When the pupil is off just a bit, the dogs seem to cope well, but can have trouble when the condition is more pronounced. Microphthalmia, or an abnormally small eye, is the most common eye defect seen in homozygous merles. This can vary from just noticeable to appearing to have no eye at all (anophthalmia).
Children begin to develop hand dominance around 2-3 years and this should be well developed by age 5 and fully developed by age 6. Use of a dominant hand before 2-3 years time may occur because of abnormal fine motor development. It could also be the result of intracranial injury or injury to a limb with appropriate compensation by the other limb.
Researchers still donât understand why around 10 per cent of the population turn out to be left-handed. Most children have a preference for using one hand or the other by the age of about 18 months, and are definitely right or left-handed by about the age of three. If your child is naturally left-handed, donât try to force them into using their right hand.